I bought a couple items from Glen in the past and he seemed like a good guy. I also read his site on occasion and found most of his blogs interesting. It's sad to hear of his death.
This might be a bit cold, but in my opinion very worth mentioning. I don't know what he had going on in his life, and I didn't know him personally, but from what I could see from a distance he lived a very unhealthy life (smoking, overweight, etc.).
Perhaps his untimely death might help remind some of those around him just how mortal we are. 46 years old is way too young to die.